In the case of capillarity, the rise or fall of head 'h' in a capillar – McqOptions

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1.	In the case of capillarity, the rise or fall of head 'h' in a capillary tube of diameter 'd', liquid surface tension 'σ' and specific weight w is given by
A.	4σ/wd
B.	4dσ/w
C.	4wd/σ
D.	4d/σw
Answer» B. 4dσ/w

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